IB Chemistry SL 1.3.1 Emission Spectra

Practise explaining line emission and absorption spectra through electron transitions between discrete energy levels. Relate colour, wavelength, frequency and photon energy,…

Syllabus
First assessment 2025
Objective
1.3.1
Level
SL

Exam points

  • explain an emission or absorption line through a photon-driven electron transition
  • convert a wavelength to frequency and photon energy using c = fλ and E = hf
  • compare electromagnetic regions by wavelength, frequency and energy using data-booklet values

1.3.1—Emission spectra question 1

[Maximum number: 2]

Lithium and boron are elements in period 2 of the periodic table. Lithium occurs in group 1 (the alkali metals) and boron occurs in group 3. Isotopes exist for both elements.

Every element has its own unique line emission spectrum.

Distinguish between a continuous spectrum and a line spectrum.

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